CN109831157A - A kind of system and method for simplified photovoltaic group string remittance line - Google Patents
A kind of system and method for simplified photovoltaic group string remittance line Download PDFInfo
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- CN109831157A CN109831157A CN201910245358.3A CN201910245358A CN109831157A CN 109831157 A CN109831157 A CN 109831157A CN 201910245358 A CN201910245358 A CN 201910245358A CN 109831157 A CN109831157 A CN 109831157A
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- 230000008676 import Effects 0.000 claims abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 8
- 229910052802 copper Inorganic materials 0.000 description 26
- 239000010949 copper Substances 0.000 description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 23
- 238000010586 diagram Methods 0.000 description 11
- 238000003032 molecular docking Methods 0.000 description 6
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- 238000012986 modification Methods 0.000 description 5
- 239000004020 conductor Substances 0.000 description 3
- 210000002445 nipple Anatomy 0.000 description 2
- 238000002788 crimping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- 238000013082 photovoltaic technology Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention discloses a kind of systems of simplified photovoltaic group string remittance line, comprising: multichannel photovoltaic group string, multistage confluence cable and multiple remittance wiring connectors；Wherein: the positive and negative outlet access first segment confluence cable of first via photovoltaic group string；The positive and negative outlet for the confluence cable that the positive and negative outlet of subsequent every road photovoltaic group string and the preceding group string of photovoltaic all the way import converges into positive and negative outlet all the way by remittance wiring connector, then the positive and negative outlet after confluence is accessed next section of confluence cable；Final stage confluence cable access photovoltaic group string inverter or header box.Furthermore, the invention also discloses a kind of methods of simplified photovoltaic group string remittance line to effectively reduce the quantity of photovoltaic group string direct current cable through the invention, reduce photovoltaic group string direct current cable expense, facilitate photovoltaic group string direct current cable fix, arrangement and the operation in later period and maintenance.
Description
Technical field
The present invention relates to photovoltaic technology field more particularly to a kind of system and methods of simplified photovoltaic group string remittance line.
Background technique
Photovoltaic group string direct current cable on photovoltaic bracket is usually designed according to photovoltaic group string, and every road photovoltaic group string is with a fixed number
Amount is drawing positive and negative anodes group from different location after the series connection of component positive and negative anodes and is getting lines crossed cable, and multichannel group, which is being got lines crossed, goes to confluence along bracket
The position wiring of the equipment such as case or group string inverter, specifically, conventional photovoltaic cable cabling is as shown in Figure 1 and Figure 2, photovoltaic group
Each photovoltaic module 110 inside string 100 is connected by the way of adjacent, photovoltaic where the anode of first piece of photovoltaic module is used as
The positive outlet 131 of group string, the negative outlet 132 of cathode photovoltaic group string as where of last block photovoltaic module, then by each light
The positive and negative outlet of volt group string is connected to inverter together.Increase cable however as number gradually to add up by amount, in disparity items usually
It has 10~20 photovoltaic groups cable of getting lines crossed and is connected to group string inverter or 20~30 photovoltaic groups cable of getting lines crossed is being connected to photovoltaic array remittance
Case is flowed, so a large amount of photovoltaic group cable of getting lines crossed generally first is being simply secured on bracket with band, and the laggard leading groove of certain amount is right
25 years operation periods are up in photovoltaic plant, and this way will be so that later period O&M be difficult, and number of cables more later periods
Breaking down may be also more.
In existing photovoltaic project Normal practice be multichannel photovoltaic group concatenated into group string inverter with photovoltaic cable or
Header box.It causes number of cables mostly many and diverse in this way, is also not easy to O&M and the management in later period.Therefore, how by photovoltaic group string
Direct current cable quantity effectively reduces, and reduces photovoltaic group string direct current cable cable expense, to greatly mitigate the photovoltaic of photovoltaic project
Group string direct current cable workload, facilitate photovoltaic group string direct current cable fix and arrange and later period maintenance work become one urgently
Problem to be solved.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of system and methods of simplified photovoltaic group string remittance line, specifically
Technical solution it is as follows:
On the one hand, the invention discloses a kind of systems of simplified photovoltaic group string remittance line, comprising: multichannel photovoltaic group string, multistage
Converge cable and multiple remittance wiring connectors；Wherein: the positive and negative outlet access first segment confluence cable of first via photovoltaic group string；Afterwards
The positive and negative outlet for the confluence cable that the positive and negative outlet of the road Xu Mei photovoltaic group string is imported with the preceding group string of photovoltaic all the way is connect by remittance line
Device converges into positive and negative outlet all the way, then the positive and negative outlet after confluence is accessed next section of confluence cable；Final stage confluence cable connects
Enter photovoltaic group string inverter or header box.
Preferably, the positive leading-out terminal of every road photovoltaic group string is further connected with one section of protection cable before access converges wiring connector,
To protect corresponding photovoltaic group string not by the damage of overcurrent condition.
Preferably, the protection cable be the direct current cable with DC insurance silk or fuse, the two of the direct current cable
Side pressure is connected to connection terminal.
Preferably, the bus bar is two core wires or parallel lines.
Preferably, the sectional area value of every section of bus bar is at least 1.25 times of line energizing flow magnitude.Specifically, cable cross-sections
Product S≤1.25*I (m2)；Wherein S----- copper conductor sectional area (m2) I----- load current (A).
Preferably, the wiring connector that converges includes Y-connector, t connector, any one among three-way connection.
Preferably, photovoltaic module positive and negative anodes are connected in a manner of jumper connection in the photovoltaic group string, are specifically included:
The photovoltaic group string includes multiple photovoltaic modulies；Wherein, anode the n-th+2 photovoltaics of connection of n-th of photovoltaic module
The cathode of component, wherein n is even number；The cathode of m-th of photovoltaic module connects the anode of the m+2 photovoltaic module, and wherein m is surprise
Number；The cathode of the last one odd bits component is connect with the anode of the last one even bit component, and first photovoltaic module is just
Positive and negative outlet extremely with the negative pole end of second photovoltaic module as the photovoltaic group string.
On the other hand, the invention also discloses a kind of methods of simplified photovoltaic group string remittance line, comprising: by the 1st road photovoltaic group
The positive and negative outlet access first segment confluence cable of string；Just by the positive and negative outlet of the 2nd road photovoltaic group string and first segment confluence cable
Negative outlet is after remittance wiring connector converges into positive and negative outlet all the way, access second segment confluence cable；By the positive and negative of the 3rd road photovoltaic group string
Outlet and the positive and negative outlet of second segment confluence cable access third section bus bar after remittance wiring connector converges into positive and negative outlet all the way
Cable；By the way of converging step by step, by the confluence cable of the positive and negative outlet of every road photovoltaic group string and the remittance of the preceding group string of photovoltaic all the way
Positive and negative outlet converge into positive and negative outlet all the way by converging wiring connector, then the positive and negative outlet after confluence is accessed into next section of bus bar
Cable；By final stage confluence cable access photovoltaic group string inverter or header box.
Preferably, before the positive and negative outlet of each photovoltaic group string is imported corresponding confluence cable further include: by every road light
The one protection cable of positive leading-out terminal access of volt group string；The protection cable is the band DC insurance silk that both ends are crimped with connection terminal
Or the direct current cable of fuse.
Preferably, the method for the simplified photovoltaic group string remittance line further include: by each photovoltaic group in every road photovoltaic group string
Part is connected in a manner of jumper connection, specifically: the anode of n-th of photovoltaic module is connected to the cathode of the n-th+2 photovoltaic modulies, wherein n
For even number；The cathode of m-th of photovoltaic module is connected to the anode of the m+2 photovoltaic module, wherein m is odd number；By the last one
The cathode of odd bits component is connect with the anode of the last one even bit component；And by the positive terminal and of first photovoltaic module
Positive and negative outlet of the negative pole end of two photovoltaic modulies as the photovoltaic group string.
The present invention at least has with the next item down technical effect:
(1) present invention by the way of converging step by step, by the positive and negative outlet of every road photovoltaic group string and the preceding group string of photovoltaic all the way
The positive and negative outlet of the confluence cable of remittance converges into positive and negative outlet all the way by remittance wiring connector, then accesses another section of confluence cable,
So that final, only confluence cable accesses photovoltaic group string inverter or header box all the way.Enormously simplify photovoltaic group on photovoltaic bracket
The quantity of string remittance line cable, optimizes the layout of photovoltaic group string cabling, reduces photovoltaic group string direct current cable expense, also can be very big
Mitigation photovoltaic project photovoltaic group string direct current cable converge line workload, facilitate photovoltaic group string direct current cable to fix and arrange,
And later period maintenance work.
(2) present invention is further connected with one section of protection cable in the positive leading-out terminal of every road photovoltaic group string, to protect corresponding light
Volt group string is not by the damage of overcurrent condition.Specifically, protection cable be both ends be crimped with connection terminal band DC insurance silk or
The direct current cable of fuse.There is insurance to protect per photovoltaic group string all the way to ensure that.
(3) each cable docking of photovoltaic group string remittance line of the present invention can be used connection terminal and be docked, such as every road light
The positive outlet of volt group string is docked with protection cable, and the docking of MC4 connector, protection cable and the wiring connector lead that converges can be used
It docking and converges wiring connector outlet and the cable that converges and docks etc. to can be used and dock terminal and docked, it so can be complete
At rapid abutting joint, mitigate remittance line workload, and convenient for subsequent maintenance and arranges.
(4) present invention uses the connection type of jumper connection to the connection of each photovoltaic component inside photovoltaic group string, effectively avoids
The positive and negative appearance of photovoltaic group string is located at the situation on farther away two pieces of photovoltaic modulies, and it is more to be particularly suitable for photovoltaic module
Situation reduces cost to further save cable, reduces loss.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without any creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is the remittance line schematic diagram of photovoltaic group string in the prior art；
Fig. 2 is another remittance line schematic diagram of photovoltaic group string in the prior art；
Fig. 3 is a kind of schematic diagram of the system embodiment one of simplified photovoltaic group string remittance line of the present invention；
Fig. 4 is a kind of schematic diagram of another embodiment of system of simplified photovoltaic group string remittance line of the present invention；
Fig. 5 is a kind of schematic diagram of another embodiment of system of simplified photovoltaic group string remittance line of the present invention；
Fig. 6 is the detail view in a kind of another embodiment of system of simplified photovoltaic group string remittance line of the present invention；
Fig. 7 is the detail view in a kind of another embodiment of system of simplified photovoltaic group string remittance line of the present invention；
Fig. 8 is each photovoltaic module jumper connection connection schematic diagram in photovoltaic group string in the present invention；
Fig. 9 calculates schematic diagram for cable copper consumption used in the remittance line of photovoltaic group string in the prior art；
Figure 10 is to calculate schematic diagram using cable copper consumption used in photovoltaic group string of the present invention remittance line mode；
Figure 11 is a kind of flow chart of the embodiment of the method for simplified photovoltaic group string remittance line of the present invention；
Figure 12 is a kind of flow chart of another embodiment of method of simplified photovoltaic group string remittance line of the present invention.
Appended drawing reference:
100-- photovoltaic group string；110-- photovoltaic module；111-- photovoltaic module anode；112-- photovoltaic module cathode；120--
Abutment line；The positive outlet of 131-- photovoltaic group string；The negative outlet of 132-- photovoltaic group string；The positive and negative outlet of 200-- multichannel photovoltaic group string；
101-- first via photovoltaic group string；The second road 102-- photovoltaic group string；103-- third road photovoltaic group string；140-- jumper；300--
Remittance wiring connector；400-- confluence cable；401-- first segment confluence cable；402-- second segment confluence cable；403-- third section
Converge cable；500-- protects cable；600--MC4 connector；610--MC4 connector male head；620--MC4 connector female end.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that the described embodiments are only some of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
The embodiment of the present invention one discloses a kind of system of simplified photovoltaic group string remittance line, comprising: multichannel photovoltaic group string, multistage
Converge cable and multiple remittance wiring connectors；Wherein: the positive and negative outlet access first segment confluence cable of first via photovoltaic group string；Afterwards
The positive and negative outlet for the confluence cable that the positive and negative outlet of the road Xu Mei photovoltaic group string is imported with the preceding group string of photovoltaic all the way is connect by remittance line
Device converges into positive and negative outlet all the way, then the positive and negative outlet after confluence is accessed next section of confluence cable；Final stage confluence cable connects
Enter photovoltaic group string inverter or header box.
Specifically, as shown in figure 3, the positive and negative outlet of the 1st road photovoltaic group string 101 is accessed first segment confluence cable by this programme
401, first segment confluence cable 401 is walked to the positive and negative outgoing line position of the 2nd road photovoltaic group string 102, by converging wiring connector 300 for the
After the positive and negative outlet confluence of the positive and negative outlet of two road photovoltaic group strings 102 and first segment confluence cable 401, it is positive and negative out to merge into 1 tunnel
Line, then will merge the positive and negative outlet access second segment confluence cable 402 in the road Hou Zhe, and second segment confluence cable is walked to the 3rd road light
The positive and negative outgoing line position of volt group string 103, then pass through remittance wiring connector 300 for the positive and negative outlet and second of the 3rd road photovoltaic group string 103
After Duan Huiliu cable 402 converges, the positive and negative outlet in 1 tunnel is merged into, then positive and negative outlet accesses third all the way by this after merging again
Duan Huiliu cable 403, so converges step by step, finally merges into the positive and negative outlet in 1 tunnel, accesses final stage confluence cable, then only
Need to converge final stage cable access photovoltaic group string inverter or header box, be not necessarily to many and diverse access of too many cable.
In above-described embodiment, the remittance of the positive and negative outlet of every road photovoltaic group string and the positive and negative outlet of the preceding group string of photovoltaic all the way access
The positive and negative outlet of streamline cable converges into positive and negative outlet all the way by remittance wiring connector, refers to just going out the photovoltaic group string of current location
The positive outlet for the confluence cable that line (i.e. positive terminal outlet) and previous photovoltaic group string import converges into one by a remittance wiring connector
The positive outlet in road；The bus bar that the negative outlet (i.e. negative pole end outlet) of the photovoltaic group string of current location and previous photovoltaic group string are imported
The negative outlet of cable converges into negative outlet all the way by a remittance wiring connector.Finally by by converge wiring connector remittance abroad positive outlet and
Negative outlet accesses next section of confluence cable again.
It is united, photovoltaic group string direct current cable quantity can be effectively reduced using the remittance linear system of the present embodiment, reduce photovoltaic group string
Direct current cable cable expense can greatly mitigate the photovoltaic group string direct current cable cabling workload of photovoltaic project, facilitate photovoltaic group string
Direct current cable is fixed and arranged and later period maintenance work.This programme is particularly suitable for photovoltaic module and places situation vertically, also the same suitable
It is the case where for photovoltaic module traverse, related with component disposing way for the saving degree of cable.
Another embodiment of present system, as shown in Figure 4, Figure 5, on the basis of the above embodiment 1, every road photovoltaic
The positive outlet 131 of group string is further connected with one section of protection cable 500 before access converges wiring connector, to protect corresponding photovoltaic group
String is not by the damage of overcurrent condition.
In remittance linear system system of the invention, photovoltaic component inside photovoltaic group string can be using traverse or that places vertically put feelings
Condition, this programme are specially adapted to the case where placing vertically.It places vertically and can be placed vertically with a block part, as the photovoltaic group string inside in Fig. 4 is each
The disposing way of photovoltaic component, in addition, place vertically can also two block parts place vertically, such as each photovoltaic portion inside the photovoltaic group string in Fig. 5
The disposing way of part, regardless of mode, the positive and negative outlet of photovoltaic group string will all import confluence cable step by step.
Per the positive leading-out terminal of photovoltaic group string all the way (i.e. positive leading-out terminal) is connected into protection cable, is guaranteed per group string all the way
There is insurance to protect.
Preferably, the protection cable be the direct current cable with DC insurance silk or fuse, the two of the direct current cable
Side pressure is connected to connection terminal.
It is connected to the direct current cable with DC insurance silk or fuse per the positive leading-out terminal of photovoltaic group string all the way, thus
It is protected to per photovoltaic group string branch all the way.And the direct current cable both ends are crimped with connection terminal, to photovoltaic group string
Positive outlet docking, it is more easy that cable connects, and is also convenient for the maintenance in later period.
As shown in Figure 6, Figure 7, the docking of each cable can crimp connection terminal on needing the cable docked in this system
It is docked.Preferably, the connection terminal of each direct current cable both ends crimping is generally MC4 connector 600.In addition, MC4 connector
600 can also be used between photovoltaic module, cable docking is used between photovoltaic group string, usually by a pair of of male connector 610 and 620 groups of female
At.MC4 connector is that wider product is used inside photovoltaic art.
In any of the above-described embodiment, the confluence cable is two core wires or parallel lines.The parallel lines or 2 core photovoltaic cables
It is to be crimped together 2 cables to form 1 parallel lines, or 2 cables are wrapped together with insulating protection crust, the two of line
End can carry out clamped nipple respectively, and terminal is usually MC4 connector, and the sectional area of cable has 4 flat, 6 flat, 10 flat, 16 equalitys
Specification.
Preferably, the sectional area value of every section of bus bar is at least 1.25 times of line energizing flow magnitude.
Specifically, cable cross-sections accumulate S≤1.25*I (m2)；Wherein S----- copper conductor sectional area (m2) I----- load electricity
It flows (A).
Preferably, the remittance wiring connector is by cable, intermediate confluence and two end connector groups in any of the above-described embodiment
At.For example Y-connector, t connector, three-way connection etc., the sectional area of cable have 4 flat, 6 flat, 10 equality specifications.Specifically
, Y-connector refers to that the main body of the remittance wiring connector is Y type, as shown in the remittance wiring connector 300 in Fig. 4, Fig. 5.T-type
Connector refers to that the main body of the remittance wiring connector is T-type.Three-way connection is common cable three-way connection.These remittance lines connect
Connecing device all is that two lines road is converged into a route, to simplify route, also saves the dosage of cable.
Another embodiment of present system, based on any of the above embodiments, photovoltaic group in the photovoltaic group string
Part positive and negative anodes are connected in a manner of jumper connection, and the schematic diagram of jumper connection is as shown in figure 8, specifically include:
The photovoltaic group string 100 includes multiple photovoltaic modulies 110；Wherein, the anode connection n-th+2 of n-th of photovoltaic module
The cathode of a photovoltaic module, wherein n is even number；The cathode of m-th of photovoltaic module connects the anode of the m+2 photovoltaic module,
Middle m is odd number；The cathode of the last one odd bits component is connect with the anode of the last one even bit component, first photovoltaic group
Positive and negative outlet of the negative pole end of the positive terminal of part and second photovoltaic module as the photovoltaic group string.
Certainly, each component is relatively specific for component count using the connection type of jumper connection in the photovoltaic group string of the present embodiment
It is more, and photovoltaic module single the case where placing vertically.If each photovoltaic module quantity is more in photovoltaic group string, and photovoltaic module is double perpendicular
The case where putting can then be connected by the way of adjacent, but need to by first piece of photovoltaic module and with first piece of photovoltaic module phase
Last adjacent block assembly respectively draws one end, the positive and negative anodes as place photovoltaic group string.Specifically, reference can be made to shown in attached drawing 7
Component connection inside photovoltaic group string out.
On large scale business photovoltaic bracket, a certain number of photovoltaic module positive and negative anodes are with adjacent or bridging, jumper connection side
Formula connects to form photovoltaic group string, and Normal practice is to be concatenated multichannel photovoltaic group into group string inverter or a remittance with photovoltaic cable
Flow case.Another embodiment of the present invention will connect band insurance cable per the positive terminal of photovoltaic group string all the way, guarantee per group all the way
String has insurance to protect, and then walks the positive and negative outlet access parallel lines in the 1st tunnel or 2 core wires, parallel lines or 2 core wires to the 2nd tunnel group
It goes here and there positive and negative outgoing line position, by converging after wiring connector confluence, merges into the positive and negative outlet in 1 tunnel, then proceed to access parallel lines or 2 cores
Line walks parallel lines or 2 core wires to the 3rd road outgoing line position Zu Chuan, and after remittance wiring connector confluence, it is positive and negative out to merge into 1 tunnel
Then line is further continued for access parallel lines or 2 core wires, so converges step by step, merge into the positive and negative outlet in 1 tunnel.The group string specifically merged
Number can be done reasonable distribution by actual demand, the direct current that the sectional area size of wiring connector and parallel lines of converging is carried according to route
1.25 times of stream are selected.
The dosage of photovoltaic group string direct current cable, can be by copper consumption come intuitively comparing.
The photovoltaic group string direct current cable copper consumption of conventional scheme, as shown in figure 9, the total road n photovoltaic group string on photovoltaic bracket, cuts
Area is S1, length of cable L1, L2 ..., the Ln: the 1 road copper consumption be S1*L1, the 2nd road copper consumption is S1*L2 ..., the n-th tunnel
Copper consumption is S1*Ln, and copper consumption is S1*L1+S1*L2+ ... S1*Ln to route in total.Length of cable L1=(n-1) * a+b, L2=
(n-2) * a+b ..., Ln=(n-n) * a+b, wherein a represents the cable on a group string bracket, and b represents the cable in non-stent,
Arrangement obtain photovoltaic group string direct current cable in total copper consumption be S1* ((n-1) * a+b)+S1* ((n-2) * a+b)+...+S1* ((n-
N) * a+b)=a* (1*S1+2*S1+ ...+(n-1) * S1)+b*n*S1.
The photovoltaic group string direct current cable copper consumption of this programme, as shown in Figure 10, converge line on the photovoltaic group string total road n, sectional area S1,
S2 ..., Sn, length of cable L1, L2 ..., the Ln: the 1 road copper consumption be S1*L1, the 2nd road copper consumption be S2*L2 ..., the n-th tunnel use
Amount of copper is Sn*Ln, and copper consumption is S1*L1+S2*L2+ ...+Sn*Ln to route in total.Length of cable L1=a, L2=a ..., L (n-
1)=a, Ln=b, wherein a represents the cable on a group string bracket, and b represents the cable in non-stent, and arrangement obtains photovoltaic group
Copper consumption is S1*a+S2*a+ ...+S (n-1) * a+Sn*b=a* (S1+S2+ ...+S (n-1))+b*Sn to string direct current cable in total.
Photovoltaic group string direct current cable sectional area specification is generally 4 flat, 6 flat, 10 flat, 16 equalitys, and the sectional area of parallel lines is big
Small (m2) selected according to 1.25 times of the DC current (A) of route carrying.It is calculated with 1.25 times, conventional scheme photovoltaic group string is straight
Streamline cable sectional area S1=4, cable cross-sections product used of converging successively sequentially should be S1=4, S2=4, S3=6, S4=6, S5
=10, S6=16 ...: when n=6, conventional scheme group is being got lines crossed cable copper consumption 60a+24b, and this programme group is being got lines crossed cable copper consumption 30a+
16b；When n=5, conventional scheme group is being got lines crossed cable copper consumption 40a+20b, and this programme group is being got lines crossed cable copper consumption 20a+10b；When n=4,
Conventional scheme group is being got lines crossed cable copper consumption 24a+16b, and this programme group is being got lines crossed cable copper consumption 14a+6b.
Sectional area Sn after remittance line is respectively less than n*S1, so the copper consumption of this programme will be less than conventional scheme.
From the above photovoltaic group string direct current cable copper consumption data, intuitively reflect that this programme can obviously save photovoltaic
The dosage of group string direct current cable.
Based on the same technical idea, of the invention the invention also discloses a kind of method of simplified photovoltaic group string remittance line
Method of the invention can be used to carry out remittance line to photovoltaic group string in the system for simplifying photovoltaic group string remittance line, specifically, such as Figure 11 institute
Show, comprising:
S101, by the positive and negative outlet access first segment confluence cable of the 1st road photovoltaic group string；
S102, by the positive and negative outlet of the 2nd road photovoltaic group string and the positive and negative outlet of first segment confluence cable through remittance wiring connector
After converging into positive and negative outlet all the way, access second segment confluence cable；
S103, by the positive and negative outlet of the 3rd road photovoltaic group string and the positive and negative outlet of second segment confluence cable through remittance wiring connector
After converging into positive and negative outlet all the way, access third section confluence cable；
S104 is imported the positive and negative outlet of every road photovoltaic group string and the preceding group string of photovoltaic all the way by the way of converging step by step
The positive and negative outlet of confluence cable converge into positive and negative outlet all the way by converging wiring connector, then will be under the positive and negative outlet access after confluence
One section of confluence cable；
S105, by final stage confluence cable access photovoltaic group string inverter or header box.
Using the remittance line method of the present embodiment, photovoltaic group string cabling schematic diagram after line is converged as shown in figure 3, with this solution,
Finally occurring for multiple photovoltaic group strings is always cable all the way.Photovoltaic group string direct current cable quantity can be effectively reduced, reduce light
Volt group string direct current cable cable expense can greatly mitigate the photovoltaic group string direct current cable cabling workload of photovoltaic project, facilitate light
Volt group string direct current cable is fixed and arranged and later period maintenance work.This programme is particularly suitable for photovoltaic module and places situation vertically,
The case where being equally applicable to photovoltaic module traverse, it is related with component disposing way for the saving degree of cable.
Preferably, as shown in figure 12, before the step S101 of above-described embodiment further include:
S100, by the one protection cable of positive leading-out terminal access of every road photovoltaic group string；The protection cable is crimped with for both ends
The direct current cable with DC insurance silk or fuse of connection terminal.
Specifically, being connected to the AC line with DC insurance silk or fuse per the positive leading-out terminal of photovoltaic group string all the way
Cable, to be protected to per photovoltaic group string branch all the way.And the direct current cable both ends are crimped with connection terminal, for example MC4 connects
Device is connect, to dock with the positive outlet of photovoltaic group string, it is more easy that cable connects, and is also convenient for the maintenance in later period.Specifically show
It is intended to as shown in Figure 4, Figure 5.
On the flat single-shaft support of large scale businessization, it is single on the photovoltaic group string limited amount that is commonly installed, put down uniaxial single
On photovoltaic module connect to form photovoltaic group string in a manner of adjacent or bridging, jumper connection, will be per photovoltaic group string all the way
Positive terminal connects band insurance cable, guarantees have insurance to protect per group string all the way, the positive and negative outlet in the 1st tunnel is then accessed parallel lines
Or 2 core wires, parallel lines or 2 core wires are walked to the 2nd tunnel positive and negative outgoing line position of group string, by converging after wiring connector confluence, merge into 1 tunnel
Positive and negative outlet then proceedes to access parallel lines or 2 core wires, parallel lines is walked to the 3rd road outgoing line position Zu Chuan, passes through remittance line connection
After device confluence, the positive and negative outlet in 1 tunnel is merged into, access parallel lines or 2 core wires is then further continued for, so converges step by step, merge into 1 tunnel
Positive and negative outlet can be converged as unit of single on flat single-shaft support, and so that the photovoltaic group string of every row is converged is 1 tunnel, then be accessed
Photovoltaic group string inverter or header box.The sectional area size of remittance wiring connector and parallel lines or 2 core wires is according to line energizing flow amount
1.25 times select.For this method for the product in terms of flat single-axis tracker, every row's photovoltaic group cable of getting lines crossed can reduce to 1 cable.
In any of the above-described embodiment, the bus bar is two core wires or parallel lines.The parallel lines or 2 core photovoltaic cables are
2 cables are crimped together to form 1 parallel lines, or 2 cables are wrapped together with insulating protection crust, the both ends of line
Clamped nipple can be carried out respectively, and terminal is usually MC4 connector, and the sectional area of cable has 4 flat, 6 flat, 10 flat, 16 equalitys rule
Lattice.
The wiring connector that converges can be Y-connector, t connector, three-way connection etc..
The sectional area value of every section of bus bar is at least 1.25 times of line energizing flow magnitude.Specifically, cable cross-sections product S≤
1.25*I(m2)；Wherein S----- copper conductor sectional area (m2) I----- load current (A).
Another embodiment of the method for the present invention, based on any of the above embodiments, the simplified photovoltaic group string remittance line
Method further include: each photovoltaic module in every road photovoltaic group string is connected in a manner of jumper connection, specifically:
By the cathode of anode the n-th+2 photovoltaic modulies of connection of n-th of photovoltaic module, wherein n is even number；
The cathode of m-th of photovoltaic module is connected to the anode of the m+2 photovoltaic module, wherein m is odd number；
The cathode of the last one odd bits component is connect with the anode of the last one even bit component；And by first light
Positive and negative outlet of the negative pole end of the positive terminal and second photovoltaic module that lie prostrate component as the photovoltaic group string.
The present embodiment is other than optimizing wiring to photovoltaic group string external connection cable, also directed to connecting inside photovoltaic group string
Wiring cable is optimized.The photovoltaic group string back panel wiring that traditional monolithic is placed vertically is usually to be sequentially connected in series adjacent component
Come, there are a group positive and negative anodes for string, is concatenated for that will organize into header box, it is necessary to using cable that group string is positive and negative apart from farthest both ends
A pole in extremely lead to it is another extremely near, then carry out subsequent remittance line, this mode of connection is larger to the consumption of cable.And it uses
The scheme of the present embodiment, jumper connection schematic diagram as shown in figure 8, connect each photovoltaic module inside photovoltaic group string by jumper connection mode,
The positive and negative appearance that then can effectively avoid photovoltaic group string is located at the situation on farther away two pieces of photovoltaic modulies, is particularly suitable for light
The more situation of component is lied prostrate, to further save cable, cost is reduced, reduces loss.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of system of simplified photovoltaic group string remittance line characterized by comprising multichannel photovoltaic group string, multistage confluence cable, and
Multiple remittance wiring connectors；Wherein:
The positive and negative outlet access first segment confluence cable of first via photovoltaic group string；
The positive and negative outlet for the confluence cable that the positive and negative outlet of subsequent every road photovoltaic group string and the preceding group string of photovoltaic all the way import passes through remittance
Wiring connector converges into positive and negative outlet all the way, then the positive and negative outlet after confluence is accessed next section of confluence cable；
Final stage confluence cable access photovoltaic group string inverter or header box.
2. a kind of system of simplified photovoltaic group string remittance line according to claim 1, which is characterized in that every road photovoltaic group string
Positive leading-out terminal is further connected with one section of protection cable before access converges wiring connector.
3. a kind of simplified photovoltaic group string according to claim 2 converges the system of line, which is characterized in that the protection cable is
The both ends of direct current cable with DC insurance silk or fuse, the direct current cable are crimped with connection terminal.
4. a kind of system of simplified photovoltaic group string remittance line according to claim 1, which is characterized in that the bus bar is two
Core wire or parallel lines.
5. a kind of system of simplified photovoltaic group string remittance line according to claim 4, which is characterized in that section of every section of bus bar
Area value is at least 1.25 times of line energizing flow magnitude.
6. a kind of system of simplified photovoltaic group string remittance line according to claim 1, which is characterized in that the remittance wiring connector
Including any one among Y-connector, t connector, three-way connection.
7. a kind of system of simplified photovoltaic group string remittance line according to claim 1-6, which is characterized in that the light
Photovoltaic module positive and negative anodes are connected in a manner of jumper connection in volt group string, are specifically included:
The photovoltaic group string includes multiple photovoltaic modulies；Wherein, anode the n-th+2 photovoltaic modulies of connection of n-th of photovoltaic module
Cathode, wherein n be even number；The cathode of m-th of photovoltaic module connects the anode of the m+2 photovoltaic module, and wherein m is odd number；
The cathode of the last one odd bits component is connect with the anode of the last one even bit component, the positive terminal of first photovoltaic module
Positive and negative outlet with the negative pole end of second photovoltaic module as the photovoltaic group string.
8. a kind of method of simplified photovoltaic group string remittance line, which is characterized in that the described method includes:
By the positive and negative outlet access first segment confluence cable of the 1st road photovoltaic group string；
The positive and negative outlet of 2nd road photovoltaic group string and the positive and negative outlet of first segment confluence cable are converged into all the way just through remittance wiring connector
After negative outlet, access second segment confluence cable；
The positive and negative outlet of 3rd road photovoltaic group string and the positive and negative outlet of second segment confluence cable are converged into all the way just through remittance wiring connector
After negative outlet, access third section confluence cable；
By the way of converging step by step, by the confluence cable of the positive and negative outlet of every road photovoltaic group string and the remittance of the preceding group string of photovoltaic all the way
Positive and negative outlet converge into positive and negative outlet all the way by converging wiring connector, then the positive and negative outlet after confluence is accessed into next section of bus bar
Cable；
By final stage confluence cable access photovoltaic group string inverter or header box.
9. a kind of simplified photovoltaic group string according to claim 8 converges the method for line, which is characterized in that by each photovoltaic group string
Positive and negative outlet access before corresponding confluence cable further include:
By the one protection cable of positive leading-out terminal access of every road photovoltaic group string；The protection cable is that both ends are crimped with connection terminal
Direct current cable with DC insurance silk or fuse.
10. a kind of method of simplified photovoltaic group string remittance line according to claim 8 or claim 9, which is characterized in that further include:
Each photovoltaic module in every road photovoltaic group string is connected in a manner of jumper connection, specifically:
By the cathode of anode the n-th+2 photovoltaic modulies of connection of n-th of photovoltaic module, wherein n is even number；
The cathode of m-th of photovoltaic module is connected to the anode of the m+2 photovoltaic module, wherein m is odd number；
The cathode of the last one odd bits component is connect with the anode of the last one even bit component；And by first photovoltaic group
Positive and negative outlet of the negative pole end of the positive terminal of part and second photovoltaic module as the photovoltaic group string.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113609432A (en) * | 2021-07-27 | 2021-11-05 | 阳光新能源开发有限公司 | Photovoltaic power station cable length calculation method and device and storage medium |
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| CN205961056U (en) * | 2016-07-14 | 2017-02-15 | 阳光电源股份有限公司 | Photovoltaic conflux case , photovoltaic inverter and grid -connected PV power generation system |
| CN209375574U (en) * | 2019-03-29 | 2019-09-10 | 江苏中信博新能源科技股份有限公司 | A kind of system of simplified photovoltaic group string remittance line |
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